Grease filter

ABSTRACT

A grease filter capable of reducing a pressure loss generated while air passes through the grease filter, and cooking apparatus are provided. The grease filter includes an inflow portion configured for oil particles to be introduced therethrough, and a channel provided to discharge air current and oil particles, which are introduced through the inflow portion, to an outside, wherein the channel includes an upper channel disposed in parallel while spaced apart in a predetermined distance to form the inflow portion, and a lower channel comprising a direction changing portion provided to change a direction of the air current and the oil particles introduced through the inflow portion, and a guide portion having a predetermined angle to guide the oil particles and the air current having been changed in direction by the direction changing portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is related to and claims priority to Korean Patent Application No. 2011-0123954, filed on Nov. 25, 2011 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein.

BACKGROUND

1. Field

The embodiments discussed herein relate to a grease filter having high efficiency in capturing oil.

2. Description of the Related Art

A ventilation apparatus may be installed at a kitchen. A ventilation apparatus is configured to discharge contaminated air, that is, hazardous gas, generated during a cooking process of a food, and introduce fresh air to flow to an indoor space, thereby improving the living environment.

The ventilation apparatus may be provided with a filter to eliminate hazardous gas and with a grease filter to prevent the accumulation of oil particles, for example, inside a duct. The filter and the grease filter, instead of immediately discharging the hazardous gas generated in a kitchen to an atmosphere, capture the polluted material such as oil from the hazardous gas, and then discharge the purified air to an atmosphere.

The grease filter may be configured to prevent a duct and other driving apparatus of a ventilation apparatus from being polluted, by capturing fine oil particles that are generated during a cooking process. In order to capture the oil particles efficiently, the flow of the oil particles should be interrupted by the filter inside a flow field so that the oil particles collide with one another, and thereby the oil particles are captured while being near and/or stuck to each other.

However, a pressure loss inside the flow field may be induced by the interruption of the flow of the oil particles or by the collision of the oil particles.

The pressure loss not only reduces the energy efficiency of the ventilation apparatus, but also increases the flow noise and vibration noise thereof.

SUMMARY

According to an aspect of an exemplary embodiment of the present invention, a grease filter is provided that is capable of reducing a pressure loss generated while air passes through the grease filter.

According to an aspect of an exemplary embodiment of the present invention, a grease filter is provided that is capable of increasing the efficiency in capturing oil.

Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

In accordance with an aspect of an exemplary embodiment of the present invention, a grease filter includes an inflow portion and a channel. The inflow portion may be configured for oil particles to be introduced therethrough. The channel may be provided to discharge air current and oil particles, which are introduced through the inflow portion, to an outside. The channel may include an upper channel disposed in parallel, while spaced apart a predetermined distance to form the inflow portion, and a lower channel including a direction changing portion provided to change a direction of the air current and the oil particles introduced through the inflow portion, and a guide portion having a predetermined angle to guide the oil particles and the air current, the direction of which are changed by the direction changing portion.

The guide portion may be formed in an obtuse angle with respect to the direction changing portion.

The upper channel may include an inflow guide formed in a predetermined angle to form the inflow portion, and a multiple-surface portion extending from the inflow guide to maximize a contact surface of the oil particles.

A plurality of multiple-surface portions may be provided.

The multiple-surface portion may include inner angle(s) formed by having each surface of the multiple-surface portion meet one another, and the inner angle may be formed to be equal to, or greater, than 90 degrees

The multiple-surface portion may be formed to surround an outer side of the guide portion of the lower channel.

The channel may include a discharging portion configured to discharge the oil particles and the air current to outside, and the discharging portion may be formed between the guide portion of the lower channel and at least one surface of the multiple-surface portion of the upper channel

The guide portion and the at least one surface of the multiple-surface portion forming the discharging portion may be disposed in parallel to each other.

A width of the guide portion and a width of the at least one surface of the multiple-surface portion forming the discharging portion may be gradually narrowed toward the outside.

An end portion of the multiple-surface portion may be diverged to be disposed opposite each other.

In accordance with an exemplary embodiment of the present invention, a cooking apparatus includes a heating apparatus, a body, a suction portion and a grease filter. The body may be provided with the heating apparatus at an upper side thereof. The suction portion may be provided to intake oil particles and air current, which are generated through the cooking portion, from one side of the body. The grease filter may be configured to capture oil particles that are taken in through the suction portion. The grease filter may include an inflow portion configured for oil particles and air current to be introduced therethrough, and a panel provided for the oil particles and the air current that are introduced through the inflow portion to be discharged to an outside. The panel may include an upper channel provided in parallel while being spaced apart in a predetermined distance to form the inflow portion, and a lower channel including a direction changing portion provided to change a direction of the oil particles and the air current that are introduced through the inflow portion, and a guide portion having a predetermined angle to guide the oil particles and the air current, of which the direction is changed by the direction changing portion.

The suction portion may be configured to extend formed from the one side of the body upward, and include a plurality of suction holes formed to intake the oil particles and the air current, which are generated from the heating apparatus, sideways.

The guide portion may be formed in an obtuse angle with respect to the direction changing portion.

A plurality of multiple-surface portions may be provided, and include inner angles formed as each surface of the multiple-surface portions meet one another. The inner angle may be formed to be equal to, or greater than, 90 degrees.

The channel may include a discharging portion configured to discharge the oil particles and the air current to an outside, and the discharging portion may be formed between the guide portion and at least one surface of the multiple-surface portion.

A grease filter minimizes the flow resistance of air, thereby reducing a pressure loss at an inside a flow field.

In addition, efficiency in capturing oil may be enhanced by maximizing the contact surface of the oil particles.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects of the disclosure will be move apparent from the following description of certain exemplary embodiments with reference to the accompanying drawings, in which:

FIG. 1 illustrates a cooking apparatus provided with a grease filter installed thereto in accordance with an exemplary embodiment of the present invention.

FIG. 2 illustrates a grease filter in accordance with an exemplary embodiment of the present invention.

FIG. 3A illustrates a grease filter in accordance with an exemplary embodiment of the present invention.

FIG. 3B illustrates a test on a velocity of flow passing through a grease filter in accordance with an exemplary embodiment of the present invention.

FIG. 4 illustrates a grease filter in accordance with an exemplary embodiment of the present invention.

FIG. 5A illustrates a grease filter in accordance with an exemplary embodiment of the present invention.

FIG. 5B illustrates a test on a velocity of flow passing through a grease filter in accordance with an exemplary embodiment of the present invention.

FIGS. 6 to 7 illustrate exemplary capture efficiencies at air volumes of 120 DFM and 240 CFM according to different types of filters.

FIGS. 8 to 9 illustrate exemplary capture efficiencies relative to pressure loss at air volumes of 120 DFM and 240 CFM according to different types of filters.

DETAILED DESCRIPTION

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

Referring to FIG. 1, a cooking apparatus 1 includes a body 3 forming an exterior, a heating apparatus 3A provided at an upper side of the body 3, and a suction portion 2 provided on an edge of a side of the body 3.

The heating apparatus 3A is provided to apply heat directly to a food or a cookware containing food by generating high-temperature heat.

Although an electric range, an upper portion of which is provided in a flat shape and disposed at an upper surface thereof, is illustrated as the heating apparatus 3A of the embodiment of the present invention, a gas range or an apparatus configured to perform a cooking by applying heat on a food may also be used as the heating apparatus 3A.

The suction portion 2 may be protrudedly formed from an upper surface of the body 3 while being disposed at a side away from the center of the upper surface of the body.

A plurality of suction holes 2A may be formed in a horizontal direction while spaced apart from each other in a predetermined distance on one surface of the suction portion 2, and the polluted air, the smoke, or the odor generated during a cooking process is absorbed through the plurality of suction holes 2A.

The suction hole 2A may be formed to take in the polluted air, which is being generated by the heating apparatus 3A, sideways.

Although not illustrated herein, the body 3 may be provided with a draft apparatus to take in the polluted air, smoke, or odor through the suction portion 2, and a discharging duct and a discharging hole for the air introduced by the draft apparatus to flow therethrough.

A large amount of oil particles generated during a cooking process may be included in the polluted air that is induced through the suction portion 2.

A grease filter 10 may be mounted to prevent the oil particles from being accumulated on a filter or at an inside a ventilation path.

The grease filter 10 may be mounted at a lower end portion of the suction portion 2 so that the polluted air, the smoke, or the odor induced through the suction hole 2A may pass through the grease filter 10 and having a height h and width t.

As illustrated on FIGS. 2 to 3B, the grease filter 10 includes an inflow portion 11 through which the oil particles and the air current are introduced, and a channel 20 configured so that the oil particles and the air current that are introduced through the inflow portion 11 may be discharged to an outside area.

The channel 20 includes an upper channel 22, disposed in parallel while spaced apart a predetermined distance, so that the inflow portion 11 is formed, and a lower channel 25 to change the direction of the oil particles and the air current introduced through the inflow portion 11 and to guide the oil particles and the air current introduced through the inflow portion 11 to be discharged to an outside.

The upper channel 22 is provided in at least one unit thereof. The upper channel 22 may be formed in a bilateral symmetry while being consecutively disposed.

The upper channel 22 includes an inflow guide 22 a having a predetermined angle to form the inflow portion 11, and a multiple-surface portion 23 extendedly formed from the inflow guide 22 a.

Since the inflow guide 22 a may provided in a bilateral symmetry pair, the inflow portion 11 may be formed by the inflow guide 22 a of one side of the upper channel 22 and the inflow guide 22 a of the other side of the upper channel 22 facing each other.

The oil particles and the air current introduced through the inflow portion 11 formed as such change the direction thereof through a direction changing portion 25 a of the lower channel 25.

The lower potion channel 25 includes the direction changing portion 25 a provided at a lower side of the inflow portion 11 to change the direction of the oil particles and the air current that are introduced through the inflow portion 11, and a guide portion 25 b extendedly formed from the direction changing portion 25 a to guide the oil particles and the air current, after having the direction thereof changed by the direction changing portion 25 a, to be discharged to an outside.

Since a sudden change of a direction of a flow may cause a flow resistance, the guide portion 25 b of the lower channel 25 may form an obtuse angle θ1 with respect to the direction chancing portion 25 a.

The oil particles and the air current guided by the guide portion 25 b of the lower channel 25 move along the channel 20 that is formed by the lower channel 25 and the upper channel 22.

The upper channel 22 includes the multi-surface portion 23 that is extendedly formed from the inflow guide 22 a to maximize the contact surface of the oil particles.

By maximizing the contact surface of the oil particles as such, the efficiency in capturing the oil particles may be enhanced.

The multiple-surface portion 23 may be formed with at least three surfaces.

In addition, the multiple-surface portion 23 may be formed to surround an outer side of the guide portion 25 b of the lower channel 25.

The multiple-surface portion 23 includes an inner angle θ2 formed by having the surfaces of the multi-surface portion 23 meet each other, and the inner angle θ2 may be equal to or greater than 90 degrees.

Having the inner angle θ2 equal to, or greater than, 90 degrees may minimize the flow resistance by preventing the sudden change of the direction with respect to the flow of the air current, and at the same time, may maximize the contact surface of the oil particles.

The channel 20 includes a discharging portion 12 so that the oil particles and the air current may be discharged to an outside.

The discharging portion 12 may be formed between the guide portion 25 b of the lower channel 25 and at least one surface of the multiple-surface portion 23 of the upper channel 22.

The multiple-surface portion 23 of the upper channel 22 according to the embodiment of the present invention is provided in an upside-down shape of a letter ‘Y’ having three surfaces.

The multiple-surface portion 23 may include a first multiple-surface portion 23 a extending from the inflow guide 22 a of the upper channel 22, a second multiple-surface portion 23 c extending from the first multiple-surface portion 23 a downward while forming 90 degrees with respect to the first multiple-surface portion 23 a , and a third multiple-surface portion 23 b extending from the second multiple-surface portion 23 c while forming an angle of 90 degrees or above with respect to the second multiple-surface portion 23 c.

The discharging portion 12 is formed by the outer surface of the guide portion 25 b of the lower channel 25 and by the third multiple-surface portion 23 b that is positioned at the end portion of the multiple-surface portion 23 of the upper channel 22.

Thus, the direction of oil particles and the air current introduced through the inflow portion 11 is changed by the direction changing portion 25 a of the lower channel 25. The oil particles and the air current move through the guide portion 25 b of the lower channel 25 and the multiple-surface portion 23 of the upper channel 22, and attains high capturing efficiency while making contact with the first multiple-surface portion 23 a, the second multiple-surface portion 23 c, and the third multiple-surface portion 23 b.

The sectional area of the multiple-surface portion 23 increases in proportion to the number of the surfaces added, and the number of the surfaces added increases the sectional area, thereby increasing the probability of the oil particles being captured while colliding to a wall surface of the filter. Furthermore, by having added number of the surfaces, the elbow resistance is reduced, thereby reducing the pressure loss.

The pressure loss at an elbow tube may be calculated as in equation (1):

ΔP=Δ∫·θ/90·(r·V ²)/2g  (1)

where ΔP=pressure loss, Δ∫=Coefficient of Friction, θ=Angle, V²=Fluid Velocity, r=Air Density, g=Acceleration of Gravity.

Under similar conditions, if the multiple-surface portion 23 of an exemplary embodiment (e.g., FIG. 5) has a surface added, the total number of the surfaces is 4, thereby having 0.5 times of pressure loss when compared to the pressure loss in a case when the total number of the surfaces is 3.

Thus, the capturing efficiency of the oil particles may be enhanced, while minimizing the pressure loss.

FIG. 3B illustrates a test on a velocity of flow passing through a grease filter in accordance with an exemplary embodiment of the present invention.

As illustrated on FIG. 4, the grease filter 10 according to an embodiment of the present invention includes the upper channel 22 having a plurality of multiple-surface portions 23.

The multiple-surface portion 23 includes the first multiple-surface portion 23 a, for example, extendedly formed in perpendicular from the inflow guide 22 a of the upper channel 22, the second multiple-surface portion 23 c extendedly formed from the first multiple-surface portion 23 a toward a lower direction, and the third multiple-surface portion 23 b extendedly formed from the second multiple-surface portion 23 c while having an angle equal to or greater than 90 degrees.

The discharging portion 12 may be formed by the outer surface of the guide portion 25 b of the lower channel 25 and by the third multiple-surface portion 23 b that is positioned at the end portion of the multiple-surface portion 23 of the upper channel 22.

Thus, the direction of oil particles and the air current introduced through the inflow portion 11 is changed by the direction changing portion 25 a of the lower channel 25. The oil particles and the air current then move along the channel 20 that is formed through the guide portion 25 b of the lower channel 25 and the multiple-surface portion 23 of the upper channel 22.

The oil particles may be able to attain high capturing efficiency while making contact with the first multiple-surface portion 23 a, the second multiple-surface portion 23 c, and the third multiple-surface portion 23 b of the multiple-surface portion 23.

As illustrated on FIG. 5A, the grease filter 10 according to an exemplary embodiment of the present invention includes the upper channel 22 having a plurality of multiple-surface portions 23.

The multiple-surface portion 23 includes the first multiple-surface portion 23 a extendedly formed in a horizontal direction from the inflow guide 22 a of the upper channel 22, the second multiple-surface portion 23 c extendedly formed from the first multiple-surface portion 23 a while having an angle equal to or greater than 90 degrees, the third multiple-surface portion 23D extendedly formed from the second multiple-surface portion 23 c toward a lower direction, and a fourth multiple-surface portion 23 b extendedly formed from the third multiple-surface portion 23D while having an angle equal to or greater than 90 degrees.

The discharging portion 12 is formed by the outer surface of the guide portion 25 b of the lower channel 25 and by the third multiple-surface portion 23D and the fourth multiple-surface portion 23 b.

Thus, the direction of oil particles and the air current introduced through the inflow portion 11 is changed by the direction changing portion 25 a of the lower channel 25. The oil particles and the air current then move along the channel 20 that is formed through the guide portion 25 b of the lower channel 25 and the multiple-surface portion 23 of the upper channel 22.

The oil particles may be able to attain high capturing efficiency while making contacts with the first multiple-surface portion 23 a, the second multiple-surface portion 23 c, the third multiple-surface portion 23D, and the fourth multiple-surface portion 23 b.

Referring to FIG. 5B, a simulation of testing the velocity of the fluid passing through the grease filter 10 is illustrated according to an exemplary embodiment of the present invention.

FIGS. 6 to 7 illustrate exemplary capture efficiencies at air volumes of 120 DFM and 240 CFM according to different types of filters. FIGS. 8 to 9 illustrate exemplary capture efficiencies relative to pressure loss at air volumes of 120 DFM and 240 CFM according to different types of filters

The air flow of the simulation is set at 120 CFM and 240 CFM, and the analysis of the air flow is conducted with regard to a conventional baffle A, a structure B having a partition in the middle of a baffle, a structure C having three multiple-surface portions according to the embodiment of the present invention, and a structure D having four multiple-surface portions according to the embodiment of the present invention.

As a result, when tested from the small particles having the particle sizes in the range of 2 μm and 3 μm, the structures C and D having the multiple-surface portions of an exemplary embodiment of the present invention are shown to have higher efficiency when compared to the conventional structures A and B.

FIGS. 8 to 9 illustrate exemplary capture efficiencies relative to pressure loss at air volumes of 120 DFM and 240 CFM according to different types of filters.

The simulation is conducted with reference to a conventional baffle A, a structure B having three multiple-surface portions according to an exemplary embodiment of the present invention, and a structure C having four multiple-surface portions.

The X-axis represents the pressure loss, and the Y-axis represents the average capture efficiency of the filter.

A filter may be considered to be of high quality when having a low pressure loss and high capture efficiency. The further to the left side of FIGS. 8 and 9, a result of a simulation is indicated, the lower pressure loss the result of the simulation represents, and the higher to the top side of FIGS. 8 and 9 a result of a simulation is marked indicated, the higher capture efficiencies the result of the simulation represents.

Thus, a better quality filter has characteristics illustrated towards the top-left side of FIGS. 8 and 9.

As illustrated in FIGS. 8 and 9, for example, the structures B and C having multiple-surface portions according to an exemplary e embodiment of the present invention have superior qualities when compared to the conventional structure A.

Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents. 

What is claimed is:
 1. A grease filter, comprising: an inflow portion configured for oil particles to be introduced therethrough; and a channel provided to discharge air and oil particles, which are introduced through the inflow portion, to an outside, and wherein the channel comprises: an upper channel disposed in parallel, while spaced apart a predetermined distance, to form the inflow portion; and a lower channel comprising a direction changing portion provided to change a direction of the air current and the oil particles introduced through the inflow portion, and a guide portion having a predetermined angle to guide the oil particles and the air current, of which the direction is changed by the direction changing portion.
 2. The grease filter of claim 1, wherein the guide portion is formed in an obtuse angle with respect to the direction changing portion.
 3. The grease filter of claim 1, wherein the upper channel comprises: an inflow guide formed in a predetermined angle to form the inflow portion, and a multiple-surface portion extending from the inflow guide to maximize a contact surface of the oil particles.
 4. The grease filter of claim 3, wherein the multiple-surface portion is provided in plural.
 5. The grease filter of claim 3, wherein the multiple-surface portion comprises an inner angle formed by having each surface of the multiple-surface portion meet one another, and the inner angle is formed to be equal to or greater than 90 degrees
 6. The grease filter of claim 3, wherein the multiple-surface portion is formed in a way to surround an outer side of the guide portion of the lower channel.
 7. The grease filter of claim 3, wherein the channel comprises a discharging portion configured to discharge the oil particles and the air current to an outside, and the discharging portion is formed between the guide portion of the lower channel and at least one surface of the multiple-surface portion of the upper channel.
 8. The grease filter of claim 7, wherein the guide portion and the at least one surface of the multiple-surface portion forming the discharging portion are disposed in parallel to each other.
 9. The grease filter of claim 7, wherein a width of the guide portion and a width of the at least one surface of the multiple-surface portion forming the discharging portion are gradually narrowed toward the outside.
 10. The grease filter of claim 3, wherein an end portion of the multiple-surface portion is diverged to be disposed opposite each other.
 11. A cooking apparatus, comprising: a heating apparatus; a body provided with the heating apparatus at an upper side thereof; a suction portion provided to intake oil particles and air, which are generated through the cooking portion, from a side of the body; and a grease filter configured to capture oil particles that are taken in through the suction portion, wherein the grease filter comprises: an inflow portion configured for oil particles and air current to be introduced therethrough, and a panel provided for the oil particles and the air current that are introduced through the inflow portion to be discharged to an outside, and wherein the panel, comprises: an upper channel provided in parallel while being spaced apart in a predetermined distance to form the inflow portion, and a lower channel comprising a direction changing portion provided to change a direction of the oil particles and the air current that are introduced through the inflow portion, and a guide portion having a predetermined angle to guide the oil particles and the air current, of which the direction is changed by the direction changing portion.
 12. The cooking apparatus of claim 11, wherein the suction portion is configured to extend formed from the one side of the body upward, and comprises a plurality of suction holes formed to intake the oil particles and the air current, which are generated from the heating apparatus, sideways.
 13. The cooking apparatus of claim 11, wherein the guide portion is formed in an obtuse angle with respect to the direction changing portion.
 14. The cooking apparatus of claim 11, wherein the multiple-surface portion is provided in plural, and comprises an inner angles formed as each surface of the multiple-surface portion meets one another, and the inner angle is formed to be equal to or greater than 90 degrees.
 15. The cooking apparatus of claim 11, wherein the channel comprises a discharging portion configured to discharge the oil particles and the air current to an outside, and the discharging portion is formed between the guide portion and at least one surface of the multiple-surface portion.
 16. A filter to discharge a gas and particles that are introduced, comprising: a first channel for inflow of the gas and the particles; and a second channel comprising: a direction changing portion to change a direction of the gas and the particles introduced through the first channel, and an angled guide portion to guide the particles and the gas. 